static QRectF qwtStripRect(const QRectF &rect, const QRectF &area,
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
const QwtInterval &xInterval, const QwtInterval &yInterval)
{
QRectF r = rect;
if ( xInterval.borderFlags() & QwtInterval::ExcludeMinimum )
{
if ( area.left() <= xInterval.minValue() )
{
if ( xMap.isInverting() )
r.adjust(0, 0, -1, 0);
else
r.adjust(1, 0, 0, 0);
}
}
if ( xInterval.borderFlags() & QwtInterval::ExcludeMaximum )
{
if ( area.right() >= xInterval.maxValue() )
{
if ( xMap.isInverting() )
r.adjust(1, 0, 0, 0);
else
r.adjust(0, 0, -1, 0);
}
}
if ( yInterval.borderFlags() & QwtInterval::ExcludeMinimum )
{
if ( area.top() <= yInterval.minValue() )
{
if ( yMap.isInverting() )
r.adjust(0, 0, 0, -1);
else
r.adjust(0, 1, 0, 0);
}
}
if ( yInterval.borderFlags() & QwtInterval::ExcludeMaximum )
{
if ( area.bottom() >= yInterval.maxValue() )
{
if ( yMap.isInverting() )
r.adjust(0, 1, 0, 0);
else
r.adjust(0, 0, 0, -1);
}
}
return r;
}
inline static bool qwtIsIncreasing(
const QwtScaleMap &map, const QVector<double> &values )
{
bool isInverting = map.isInverting();
for ( int i = 0; i < values.size(); i++ )
{
const double y = values[ i ];
if ( y != 0.0 )
return ( map.isInverting() != ( y > 0.0 ) );
}
return !isInverting;
}
/*!
\brief Calculate a scale map for painting to an image
\param orientation Orientation, Qt::Horizontal means a X axis
\param map Scale map for rendering the plot item
\param area Area to be painted on the image
\param imageSize Image size
\param pixelSize Width/Height of a data pixel
\return Calculated scale map
*/
QwtScaleMap QwtPlotRasterItem::imageMap(
Qt::Orientation orientation,
const QwtScaleMap &map, const QRectF &area,
const QSize &imageSize, double pixelSize) const
{
double p1, p2, s1, s2;
if ( orientation == Qt::Horizontal )
{
p1 = 0.0;
p2 = imageSize.width();
s1 = area.left();
s2 = area.right();
}
else
{
p1 = 0.0;
p2 = imageSize.height();
s1 = area.top();
s2 = area.bottom();
}
if ( pixelSize > 0.0 )
{
double off = 0.5 * pixelSize;
if ( map.isInverting() )
off = -off;
s1 += off;
s2 += off;
}
else
{
p2--;
}
if ( map.isInverting() && ( s1 < s2 ) )
qSwap( s1, s2 );
QwtScaleMap newMap = map;
newMap.setPaintInterval( p1, p2 );
newMap.setScaleInterval( s1, s2 );
return newMap;
}
static void qwtAdjustMaps( QwtScaleMap &xMap, QwtScaleMap &yMap,
const QRectF &area, const QRectF &paintRect)
{
double sx1 = area.left();
double sx2 = area.right();
if ( xMap.isInverting() )
qSwap(sx1, sx2);
double sy1 = area.top();
double sy2 = area.bottom();
if ( yMap.isInverting() )
qSwap(sy1, sy2);
xMap.setPaintInterval(paintRect.left(), paintRect.right());
xMap.setScaleInterval(sx1, sx2);
yMap.setPaintInterval(paintRect.top(), paintRect.bottom());
yMap.setScaleInterval(sy1, sy2);
}
static inline bool qwtInsidePole( const QwtScaleMap &map, double radius )
{
return map.isInverting() ? ( radius > map.s1() ) : ( radius < map.s1() );
}
static QImage qwtExpandImage(const QImage &image,
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
const QRectF &area, const QRectF &area2, const QRectF &paintRect,
const QwtInterval &xInterval, const QwtInterval &yInterval )
{
const QRectF strippedRect = qwtStripRect(paintRect, area2,
xMap, yMap, xInterval, yInterval);
const QSize sz = strippedRect.toRect().size();
const int w = image.width();
const int h = image.height();
const QRectF r = QwtScaleMap::transform(xMap, yMap, area).normalized();
const double pw = ( r.width() - 1) / w;
const double ph = ( r.height() - 1) / h;
double px0, py0;
if ( !xMap.isInverting() )
{
px0 = xMap.transform( area2.left() );
px0 = qRound( px0 );
px0 = px0 - xMap.transform( area.left() );
}
else
{
px0 = xMap.transform( area2.right() );
px0 = qRound( px0 );
px0 -= xMap.transform( area.right() );
px0 -= 1.0;
}
px0 += strippedRect.left() - paintRect.left();
if ( !yMap.isInverting() )
{
py0 = yMap.transform( area2.top() );
py0 = qRound( py0 );
py0 -= yMap.transform( area.top() );
}
else
{
py0 = yMap.transform( area2.bottom() );
py0 = qRound( py0 );
py0 -= yMap.transform( area.bottom() );
py0 -= 1.0;
}
py0 += strippedRect.top() - paintRect.top();
QImage expanded(sz, image.format());
switch( image.depth() )
{
case 32:
{
for ( int y1 = 0; y1 < h; y1++ )
{
int yy1;
if ( y1 == 0 )
{
yy1 = 0;
}
else
{
yy1 = qRound( y1 * ph - py0 );
if ( yy1 < 0 )
yy1 = 0;
}
int yy2;
if ( y1 == h - 1 )
{
yy2 = sz.height();
}
else
{
yy2 = qRound( ( y1 + 1 ) * ph - py0 );
if ( yy2 > sz.height() )
yy2 = sz.height();
}
const quint32 *line1 =
reinterpret_cast<const quint32 *>( image.scanLine( y1 ) );
for ( int x1 = 0; x1 < w; x1++ )
{
int xx1;
if ( x1 == 0 )
{
xx1 = 0;
}
else
{
xx1 = qRound( x1 * pw - px0 );
if ( xx1 < 0 )
xx1 = 0;
}
int xx2;
if ( x1 == w - 1 )
{
xx2 = sz.width();
}
else
{
xx2 = qRound( ( x1 + 1 ) * pw - px0 );
if ( xx2 > sz.width() )
xx2 = sz.width();
}
const quint32 rgb( line1[x1] );
for ( int y2 = yy1; y2 < yy2; y2++ )
{
quint32 *line2 = reinterpret_cast<quint32 *>(
expanded.scanLine( y2 ) );
for ( int x2 = xx1; x2 < xx2; x2++ )
line2[x2] = rgb;
}
}
}
break;
}
case 8:
{
for ( int y1 = 0; y1 < h; y1++ )
{
int yy1;
if ( y1 == 0 )
{
yy1 = 0;
}
else
{
yy1 = qRound( y1 * ph - py0 );
if ( yy1 < 0 )
yy1 = 0;
}
int yy2;
if ( y1 == h - 1 )
{
yy2 = sz.height();
}
else
{
yy2 = qRound( ( y1 + 1 ) * ph - py0 );
if ( yy2 > sz.height() )
yy2 = sz.height();
}
const uchar *line1 = image.scanLine( y1 );
for ( int x1 = 0; x1 < w; x1++ )
{
int xx1;
if ( x1 == 0 )
{
xx1 = 0;
}
else
{
xx1 = qRound( x1 * pw - px0 );
if ( xx1 < 0 )
xx1 = 0;
}
int xx2;
if ( x1 == w - 1 )
{
xx2 = sz.width();
}
else
{
xx2 = qRound( ( x1 + 1 ) * pw - px0 );
if ( xx2 > sz.width() )
xx2 = sz.width();
}
for ( int y2 = yy1; y2 < yy2; y2++ )
{
uchar *line2 = expanded.scanLine( y2 );
memset( line2 + xx1, line1[x1], xx2 - xx1 );
}
}
}
break;
}
default:
expanded = image;
}
return expanded;
}
/*!
Redraw the liquid in thermometer pipe.
\param painter Painter
\param pipeRect Bounding rectangle of the pipe without borders
*/
void QwtThermo::drawLiquid(
QPainter *painter, const QRect &pipeRect ) const
{
painter->save();
painter->setClipRect( pipeRect, Qt::IntersectClip );
painter->setPen( Qt::NoPen );
const QwtScaleMap scaleMap = scaleDraw()->scaleMap();
QRect liquidRect = fillRect( pipeRect );
if ( d_data->colorMap != NULL )
{
const QwtInterval interval = scaleDiv().interval().normalized();
// Because the positions of the ticks are rounded
// we calculate the colors for the rounded tick values
QVector<double> values = qwtTickList( scaleDraw()->scaleDiv() );
if ( scaleMap.isInverting() )
qSort( values.begin(), values.end(), qGreater<double>() );
else
qSort( values.begin(), values.end(), qLess<double>() );
int from;
if ( !values.isEmpty() )
{
from = qRound( scaleMap.transform( values[0] ) );
qwtDrawLine( painter, from,
d_data->colorMap->color( interval, values[0] ),
pipeRect, liquidRect, d_data->orientation );
}
for ( int i = 1; i < values.size(); i++ )
{
const int to = qRound( scaleMap.transform( values[i] ) );
for ( int pos = from + 1; pos < to; pos++ )
{
const double v = scaleMap.invTransform( pos );
qwtDrawLine( painter, pos,
d_data->colorMap->color( interval, v ),
pipeRect, liquidRect, d_data->orientation );
}
qwtDrawLine( painter, to,
d_data->colorMap->color( interval, values[i] ),
pipeRect, liquidRect, d_data->orientation );
from = to;
}
}
else
{
if ( !liquidRect.isEmpty() && d_data->alarmEnabled )
{
const QRect r = alarmRect( liquidRect );
if ( !r.isEmpty() )
{
painter->fillRect( r, palette().brush( QPalette::Highlight ) );
liquidRect = QRegion( liquidRect ).subtracted( r ).boundingRect();
}
}
painter->fillRect( liquidRect, palette().brush( QPalette::ButtonText ) );
}
painter->restore();
}